P/2023 M1 (PANSTARRS)
| Parameter |
Value |
| Designation |
P/2023 M1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-12-14T10:50:57.154560Z |
| Orbit solution date (soln_date, UTC) |
2023-06-30T22:18:01Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
22.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-06-16T09:48:14.918400Z |
| Discovery magnitude (MPC) |
20.42 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-06-04.0000000 |
| e |
0.58789811 |
| q (au) |
2.825892 |
| a (au) |
6.857265 |
| i (deg) |
12.289932 |
| Ω (om, deg) |
216.866513 |
| ω (w, deg) |
79.702108 |
| M (ma, deg) |
349.381798 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.340 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.340 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.741 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
02:33:40.76 |
+12:10:08.0 |
HIP 11941 |
5.61 |
| 2026-02-03 12:00 |
02:33:49.92 |
+12:10:42.7 |
HIP 11941 |
3.33 |
| 2026-02-04 00:00 |
02:33:59.22 |
+12:11:18.0 |
HIP 11941 |
1.14 |
| 2026-02-04 12:00 |
02:34:08.66 |
+12:11:54.0 |
HIP 11941 |
1.63 |
| 2026-02-05 00:00 |
02:34:18.24 |
+12:12:30.7 |
HIP 11941 |
3.96 |
| 2026-02-05 12:00 |
02:34:27.96 |
+12:13:08.0 |
HIP 11941 |
6.39 |
| 2026-02-06 00:00 |
02:34:37.81 |
+12:13:46.0 |
HIP 11941 |
8.87 |
| 2026-02-06 12:00 |
02:34:47.81 |
+12:14:24.6 |
HIP 11941 |
11.39 |
| 2026-02-07 00:00 |
02:34:57.93 |
+12:15:03.9 |
HIP 11941 |
13.94 |
| 2026-02-07 12:00 |
02:35:08.20 |
+12:15:43.8 |
HIP 11941 |
16.53 |
| 2026-02-08 00:00 |
02:35:18.59 |
+12:16:24.4 |
HIP 11941 |
19.16 |
| 2026-02-08 12:00 |
02:35:29.12 |
+12:17:05.5 |
HIP 12155 |
17.55 |
| 2026-02-09 00:00 |
02:35:39.79 |
+12:17:47.3 |
HIP 12155 |
15.28 |
| 2026-02-09 12:00 |
02:35:50.58 |
+12:18:29.7 |
HIP 12155 |
13.14 |
| 2026-02-10 00:00 |
02:36:01.51 |
+12:19:12.7 |
HIP 12155 |
11.25 |
| 2026-02-10 12:00 |
02:36:12.57 |
+12:19:56.3 |
HIP 12153 |
9.27 |
| 2026-02-11 00:00 |
02:36:23.76 |
+12:20:40.5 |
HIP 12153 |
7.08 |
| 2026-02-11 12:00 |
02:36:35.08 |
+12:21:25.3 |
HIP 12153 |
5.49 |
| 2026-02-12 00:00 |
02:36:46.52 |
+12:22:10.6 |
HIP 12153 |
5.16 |
| 2026-02-12 12:00 |
02:36:58.10 |
+12:22:56.6 |
HIP 12153 |
6.33 |
| 2026-02-13 00:00 |
02:37:09.80 |
+12:23:43.1 |
HIP 12153 |
8.44 |
| 2026-02-13 12:00 |
02:37:21.62 |
+12:24:30.2 |
HIP 12252 |
10.14 |
| 2026-02-14 00:00 |
02:37:33.57 |
+12:25:17.8 |
HIP 12252 |
9.56 |
| 2026-02-14 12:00 |
02:37:45.65 |
+12:26:06.0 |
HIP 12252 |
9.92 |
| 2026-02-15 00:00 |
02:37:57.85 |
+12:26:54.7 |
HIP 12252 |
11.16 |
| 2026-02-15 12:00 |
02:38:10.17 |
+12:27:44.0 |
HIP 12252 |
13.05 |
| 2026-02-16 00:00 |
02:38:22.62 |
+12:28:33.7 |
HIP 12252 |
15.37 |
| 2026-02-16 12:00 |
02:38:35.19 |
+12:29:24.1 |
HIP 12252 |
17.97 |
| 2026-02-17 00:00 |
02:38:47.87 |
+12:30:14.9 |
HIP 12252 |
20.77 |
| 2026-02-17 12:00 |
02:39:00.68 |
+12:31:06.2 |
HIP 12252 |
23.69 |
| 2026-02-18 00:00 |
02:39:13.61 |
+12:31:58.1 |
HIP 12252 |
26.72 |
| 2026-02-18 12:00 |
02:39:26.65 |
+12:32:50.5 |
HIP 12252 |
29.83 |
| 2026-02-19 00:00 |
02:39:39.81 |
+12:33:43.3 |
HIP 12252 |
33.00 |
| 2026-02-19 12:00 |
02:39:53.09 |
+12:34:36.6 |
HIP 12252 |
36.23 |
| 2026-02-20 00:00 |
02:40:06.48 |
+12:35:30.4 |
HIP 12626 |
35.40 |
| 2026-02-20 12:00 |
02:40:19.99 |
+12:36:24.7 |
HIP 12626 |
32.05 |
| 2026-02-21 00:00 |
02:40:33.61 |
+12:37:19.4 |
HIP 12626 |
28.68 |
| 2026-02-21 12:00 |
02:40:47.34 |
+12:38:14.6 |
HIP 12626 |
25.30 |
| 2026-02-22 00:00 |
02:41:01.18 |
+12:39:10.3 |
HIP 12626 |
21.92 |
| 2026-02-22 12:00 |
02:41:15.14 |
+12:40:06.4 |
HIP 12626 |
18.57 |
| 2026-02-23 00:00 |
02:41:29.20 |
+12:41:02.9 |
HIP 12626 |
15.27 |
| 2026-02-23 12:00 |
02:41:43.37 |
+12:41:59.8 |
HIP 12626 |
12.09 |
| 2026-02-24 00:00 |
02:41:57.65 |
+12:42:57.2 |
HIP 12626 |
9.19 |